Dental Silicone Base Paste for Longer Working Time Without Delayed Curing
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Solution Overview
Problem
Existing dental additive silicone impression materials face issues with delayed curing when the working time is increased, particularly when divinyltetramethyldisiloxane is added.
Innovation Solution
Incorporating a polyether with a peak molecular weight of 1,000 or less, sealed at least one terminal end with an alkenyl group, into the base paste to suppress delayed curing while extending the working time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If divinyltetramethyldisiloxane is added to increase working time, then the working time is extended, but delayed curing occurs
Solution Approach 1:
The patent changes the molecular weight parameter of the polyether component to 1,000 or less, which fundamentally alters the reaction kinetics and curing behavior of the silicone impression material. This parameter change enables extended working time without the delayed curing effect that occurs with conventional higher molecular weight polyethers when divinyltetramethyldisiloxane is added.
Solution Approach 2:
The patent creates a composite material system combining low molecular weight polyether (peak molecular weight 1,000 or less) with divinyltetramethyldisiloxane and organometallic catalyst. This composite formulation achieves synergistic effects where the low molecular weight polyether acts as a controlled reaction medium that extends working time while preventing delayed curing, resolving the technical contradiction between extended working time and reliable curing.
2Reliability
If polyether with peak molecular weight of 1,000 or less is used, then delayed curing is suppressed, but the base paste composition must be precisely controlled
Solution Approach 1:
By establishing a clear parameter threshold (peak molecular weight ≤1,000) for the polyether component, the patent simplifies composition control despite the precision required. This definitive parameter specification provides a clear manufacturing guideline that ensures reliable curing while managing the complexity of base paste formulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents delayed curing and allows for an extended working time without compromising the curing process, as demonstrated by the examples provided.
Implementation Method 1
The additive silicone impression material includes an organopolysiloxane having an alkenyl group, an organohydrogenpolysiloxane, and a hydrosilylation catalyst
Data Source
AI summary
One aspect of the present invention is a base paste for a dental additive silicone impression material, the base paste includes a polyether having a peak molecular weight of 1,000 or less, wherein at least one terminal end of the polyether is sealed with an alkenyl group.